One night before the world turns its attention to them and the Super Bowl, San Francisco 49ers head coach Jim Harbaugh and Baltimore Ravens head coach John Harbaugh may watch Saturday night’s college basketball showdown between Michigan and Indiana at historic Assembly Hall in Bloomington, Indiana.

Jim Harbaugh was a quarterback at Michigan. But Joani Harbaugh, Jim and John’s sister, is married to Indiana head coach Tom Crean. Jim Harbaugh even served as Crean’s team manager for a game in February last year.

Michigan (20-1, 7-1), ranked No. 1 for the first time in 20 years, will try to retain that ranking and stay atop the Big Ten. Indiana (18-2, 7-1), ranked No. 3 in the nation, can claw its way back to the top of the Big Ten and possibly the national rankings if the Hoosiers can knock off Michigan before a national television audience (9 p.m. EST, ESPN). Indiana and Michigan are tied atop the Big Ten standings.

Michigan is ranked first nationally for the first time since the famed Fab Five (1992-93) invigorated the college basketball world. The Wolverines are led by the trio of Trey Burke, the country’s best point guard and one of the best players in Value Add’s history, Tim Hardaway Jr., and Glenn Robinson III.

Cody Zeller, a pre-season national player of the year candidate, leads Indiana along with Victor Oladipo, who may be the country’s most improved player.

Crean and his wife, Joani, will go to New Orleans after the college basketball showdown to watch the Harbaugh brothers coach in the Super Bowl that is doubling as a Harbaugh family reunion.